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pin oak

noun
1.
an oak, Quercus palustris, characterized by the pyramidal manner of growth of its branches and deeply pinnatifid leaves.
Origin
1805-1815
1805-15, Americanism
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples for pin oak
  • Northern pin oak is distinguished from pin oak by its more tapering and elongated acorns and its preference for drier habitats.
  • Trees in the red oak group, such as northern red and northern pin oak are especially vulnerable.
  • The conical shape and stiffly arranged horizontal side branches of pin oak make it easy to spot.
  • The driest jack pine-northern pin oak barrens did not change significantly after logging.
  • Smaller poorly drained spots along the northern edge of the woods have pin oak, bur oak and red maple.
  • They are followed by the white and pin oak that turn a brownish-red color.
  • Jack pine remains on the outwash plains along with northern pin oak.
Encyclopedia Article for pin oak

either of two species of North American ornamental and timber trees belonging to the red oak group of the genus Quercus in the beech family (Fagaceae). The term is especially given to Quercus palustris, found on bottomlands and moist upland soils in the eastern and central United States. Usually about 25 m (80 feet) tall but occasionally reaching 35 m (115 feet), the tree has a broad, pyramidal crown and drooping lower branches. Spurlike, slender branchlets stand out like pins on the trunk and larger limbs. The elliptical, glossy green leaves, measuring about 13 cm (5 inches) long, have five to seven deeply cut lobes and turn scarlet in autumn. The dark brown acorns are enclosed at the base in a thin, shallow cup

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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